@book { DieSigningStatementsderUSPrsidenten,
    title = "Die «Signing Statements» der US-Präsidenten",
    author = "Sebastian {Dregger}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108100"
}